单项选择题
A.An exception is thrown at runtime by SourceServlet.
B.An exception is thrown at runtime by DestinationServlet.
C.Only "hello from dest" appears in the response output stream.
D.Both "hello from source" and "hello from dest" appear in the response output stream.
多项选择题 You want to create a filter for your web application and your filter will implement javax.servlet.Filter. Which two statements are true？（）
多项选择题 A developer wants a web application to be notified when the application is about to be shut down. Which two actions are necessary to accomplish this goal？（）
单项选择题 Your web site has many user-customizable features， for example font and color preferences on web pages.Your IT department has already built a subsystem for user preferences using the Java SE platform’s lang.util.prefs package APIs， and you have been ordered to reuse this subsystem in your web application. Youneed to create an event listener that constructs the preferences factory and stores it in the applicationscope for later use. Furthermore， this factory requires that the URL to a database must be declared in thedeployment descriptor like this： 42. 43.prefsDbURL 44. 45.jdbc：pointbase：server：//dbhost：4747/prefsDB 46. 47. Which partial listener class will accomplish this goal？（）
